Run the master, then the slaves to join the master, then the commands.
Master:
gproc m <unix-domain-socket>, e.g. gproc m /tmp/g
Note the socket number: 0.0.0.0:42092
start slave:
It has to run as root due to the private name space setup.
sudo ./gproc s tcp4 127.0.0.1:42092
Then run a command:
./gproc -f /etc/hosts,/tmp -localbin e /tmp/x tcp 0.0.0.0:0 '1' /bin/ls -ld
and it should all work.